EP1197673B1 - Dispositif d'absorption de choc d'efficacité améliorée - Google Patents

Dispositif d'absorption de choc d'efficacité améliorée Download PDF

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Publication number
EP1197673B1
EP1197673B1 EP01203892A EP01203892A EP1197673B1 EP 1197673 B1 EP1197673 B1 EP 1197673B1 EP 01203892 A EP01203892 A EP 01203892A EP 01203892 A EP01203892 A EP 01203892A EP 1197673 B1 EP1197673 B1 EP 1197673B1
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EP
European Patent Office
Prior art keywords
honeycomb
honeycombs
impact absorption
mentioned
impact
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Revoked
Application number
EP01203892A
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German (de)
English (en)
Other versions
EP1197673A3 (fr
EP1197673B8 (fr
EP1197673A2 (fr
Inventor
Mario Vismara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Adlev SRL
Original Assignee
Adlev SRL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Adlev SRL filed Critical Adlev SRL
Publication of EP1197673A2 publication Critical patent/EP1197673A2/fr
Publication of EP1197673A3 publication Critical patent/EP1197673A3/fr
Publication of EP1197673B1 publication Critical patent/EP1197673B1/fr
Application granted granted Critical
Publication of EP1197673B8 publication Critical patent/EP1197673B8/fr
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F7/00—Vibration-dampers; Shock-absorbers
    • F16F7/12—Vibration-dampers; Shock-absorbers using plastic deformation of members
    • F16F7/121—Vibration-dampers; Shock-absorbers using plastic deformation of members the members having a cellular, e.g. honeycomb, structure

Definitions

  • the present invention concerns an impact absorption device according to the preamble of claim 1.
  • Such a device is known from US-A-4 029 350.
  • Honeycombs are, in fact, special structures generally characterised by good impact absorption properties.
  • honeycomb Various types of honeycomb currently exist, firstly aluminium honeycombs.
  • honeycombs The production process of these honeycombs is basically the following: flat sheets of aluminium are reciprocally glued along pre-set lines: subsequently, the areas not glued are widened to form the cavities (that can have different shapes) of the honeycomb.
  • aluminium honeycomb is made by gluing pre-shaped aluminium sheets on flat aluminium plates. This type is characterised by thicker walls.
  • aluminium honeycombs The main limit of aluminium honeycombs is their cost which can be very high.
  • a second type of known honeycomb is the extruded plastic type.
  • honeycombs consist basically of extruded plastic tubes, for example polycarbonate, subsequently glued or welded together to form the honeycomb. They have relatively thin walls: they work well for average specific compression (generally below 10 N/mm 2 ): high energy impact therefore requires considerable expanses of this honeycomb.
  • honeycombs very high cost and restricted fields of application (not all motor vehicles have sufficient space to accommodate the necessary expanse of these honeycombs).
  • a third type of known honeycomb is the plastic injection-moulded honeycomb.
  • the walls of said honeycombs must have minimum thickness of 1 ⁇ 1.5 mm.
  • the main aim of the present invention is to produce an improved efficiency impact absorption device that offers superior performance with respect to the known technique.
  • a further aim of the present invention is to produce an improved efficiency impact absorption device that is lighter and cheaper than aluminium honeycombs.
  • a further aim of the present invention is to produce an improved efficiency impact absorption device that is cheaper than extruded plastic honeycombs.
  • the improved efficiency impact absorption device is indicated overall by reference number 10.
  • the device of the invention consists basically of a plastic injection-moulded honeycomb, or alveolar structure.
  • Said honeycomb structure is indicated overall by reference number 20 in figures 1-5.
  • the honeycomb 20 features a number of ribs 11 that define respective channels 12, with basically hexagonal section, terminating in holes 13, in the lower part of the honeycomb 20.
  • hexagonal apertures 14 that define the hexagonal channels 12 are visible in the upper part of the honeycomb 20.
  • the plastic used in the device of the present invention is a plastic resin derived from polycarbonate (trademark registered by General Electric: Xenon®).
  • This material is characterised by a high ultimate elongation value; in addition, it maintains its mechanical characteristics basically stable in the -40°C / +80°C temperature range.
  • This material is furthermore stable over a wide temperature range; it behaves well from the point of view of resilience, it is not fragile and does not tend to collapse or explode as a result of impact.
  • the high ultimate elongation value of this material permits the production of injection-moulded honeycombs that can work more efficiently than the known injection-moulded honeycombs: in fact, during impact, the internal walls of honeycombs moulded with Xenon® do not collapse and they therefore perform efficiently in absorbing the impact energy, transforming it into deformation energy.
  • honeycombs produced in this way perform more efficiently than the known injection-moulded honeycombs but not to their full potential.
  • Another suitable material that can be used in the device of the invention, as an alternative to Xenoy®, is rubber-filled polypropylene.
  • the embodiment visible in figures 4-5, and indicated overall by reference number 10', features a deformation containment element 15, preferably made of high resistance material, for example steel.
  • These containment elements 15 must be sized in order to withstand the considerable stress due both to the impact and consequent lateral thrust of the injection-moulded honeycombs (the outer walls of the honeycombs 20 tend to deform laterally when compressed).
  • the lateral walls of the honeycombs 20 also work efficiently: in fact, deformation exceeding the breaking limits of the material is prevented also at the walls themselves, which contribute to increasing the effectiveness of the impact absorption (as they do not collapse, they continue to absorb impact energy, transforming it into deformation energy).
  • the containment elements 15 can be made of high resistance material, for example steel.
  • the containment elements 15 do not necessarily have to be made integral (glued, welded) with the honeycombs; furthermore said elements can be obtained directly on the vehicles.
  • Figure 6 shows a graph representing an energy absorption curve of a first known absorber, where said curve is indicated by letter A.
  • Figure 7 shows a graph representing two energy absorption curves relating to two known absorbers, with taper (curve B) and without taper (curve C); the presence of the taper prevents the absorption curve peak.
  • figure 8 shows a graph representing three energy absorption curves, two of which relate to known absorbers, with taper (curve D) and without taper (curve E).
  • Curve F relates to the device of the invention; said curve shows the constant behaviour of the absorber of the invention in relation to different crushing percentages.
  • honeycomb structures like those described in the context of the present invention have a taper on at least one of their longitudinal ends.
  • the devices of the invention offer the same level of performance but are much cheaper and lighter.
  • the devices of the invention offer the same level of performance but are much cheaper and more compact.
  • the devices of the invention offer a much higher level of performance.
  • the context of the invention is defined in the claims attached to this application.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vibration Dampers (AREA)
  • Laminated Bodies (AREA)

Claims (2)

  1. Dispositif d'absorption de choc (10, 10') du type comportant une structure en nid d'abeilles (20), dans lequel le nid d'abeilles mentionné ci-dessus (20) se caractérise par un certain nombre de nervures (11) qui définissent des canaux respectifs (12), présentant une section, de préférence, hexagonale, se terminant par des trous (13), au niveau d'une extrémité du nid d'abeilles (20), le nid d'abeilles mentionné ci-dessus (20) étant en plastique moulé par injection et le nid d'abeilles mentionné ci-dessus se caractérisant par une forme conique au niveau d'au moins l'une de ses extrémités longitudinales, caractérisé en ce que le nid d'abeilles est combiné avec un élément de confinement de déformation enroulé autour de l'extrémité de forme conique mentionnée ci-dessus et en ce que le plastique mentionné ci-dessus est une résine de plastique dérivée de polycarbonate ou de polypropylène à charge de caoutchouc.
  2. Dispositif (10, 10') selon la revendication 1, caractérisé en ce que l'élément de confinement mentionné ci-dessus est constitué d'un matériau à résistance élevée, de préférence de l'acier.
EP01203892A 2000-10-18 2001-10-12 Dispositif d'absorption de choc d'efficacité améliorée Revoked EP1197673B8 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI002251 2000-10-18
IT2000MI002251A IT1319049B1 (it) 2000-10-18 2000-10-18 Dispositivo per l'assorbimento di urti ad efficienza migliorata

Publications (4)

Publication Number Publication Date
EP1197673A2 EP1197673A2 (fr) 2002-04-17
EP1197673A3 EP1197673A3 (fr) 2002-08-21
EP1197673B1 true EP1197673B1 (fr) 2005-12-21
EP1197673B8 EP1197673B8 (fr) 2006-03-15

Family

ID=11445988

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01203892A Revoked EP1197673B8 (fr) 2000-10-18 2001-10-12 Dispositif d'absorption de choc d'efficacité améliorée

Country Status (6)

Country Link
US (1) US20020043747A1 (fr)
EP (1) EP1197673B8 (fr)
BR (1) BR0104557B1 (fr)
DE (1) DE60116028T2 (fr)
ES (1) ES2256154T3 (fr)
IT (1) IT1319049B1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0307798D0 (en) * 2003-04-04 2003-05-07 Cintec Int Ltd Impact absorbing structure
US8141548B2 (en) * 2006-12-28 2012-03-27 Leven Industries Oscillation transfer plate for dampening noise and vibration
US7919031B2 (en) * 2008-04-17 2011-04-05 Global Ip Holdings, Llc Method and system for making plastic cellular parts and thermoplastic composite articles utilizing same
US8117972B2 (en) * 2008-07-09 2012-02-21 Global Ip Holdings, Llc Kit and shelving system to store work tools, equipment and supplies in a motor vehicle and plastic shelf for use therein
US7909379B2 (en) * 2008-09-18 2011-03-22 Global Ip Holdings, Llc Kit and bulkhead assembly for cargo vehicles
US8336933B2 (en) 2010-11-04 2012-12-25 Sabic Innovative Plastics Ip B.V. Energy absorbing device and methods of making and using the same
US10766536B2 (en) 2016-09-07 2020-09-08 Thunder Power New Energy Vehicle Development Company Limited Lateral energy absorption system
US10336373B2 (en) * 2016-09-07 2019-07-02 Thunder Power New Energy Vehicle Development Company Limited Lateral energy absorption system
USD991706S1 (en) * 2019-06-13 2023-07-11 Purple Innovation, Llc Cushion
USD990930S1 (en) * 2019-06-13 2023-07-04 Purple Innovation, Llc Cushion with hexagonal cells
CN115231133A (zh) * 2022-09-26 2022-10-25 济宁熹安科技信息有限公司 一种农副产品运输箱

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2288648A1 (fr) * 1974-03-05 1976-05-21 Peugeot & Renault Pare-chocs composite absorbeur d'energie
FR2364788A2 (fr) * 1976-09-21 1978-04-14 Peugeot & Renault Pare-chocs composite absorbeur d'energie
DE4425830C2 (de) * 1993-10-28 1996-08-08 Daimler Benz Aerospace Ag Aktivierbares energieabsorbierendes Bauteil
KR960013914A (ko) * 1994-10-04 1996-05-22 고오사이 아끼오 충격흡수 구조체
JP3493092B2 (ja) * 1996-01-16 2004-02-03 昭和飛行機工業株式会社 緩衝装置
JPH11351306A (ja) * 1998-06-12 1999-12-24 Toyobo Co Ltd 樹脂製衝撃吸収体およびそれを用いた衝撃吸収方法
US6158771A (en) * 1998-10-23 2000-12-12 Hexcel Corporation Honeycomb crash pad
JP2001082520A (ja) * 1999-09-13 2001-03-27 Idemitsu Petrochem Co Ltd 衝撃緩衝部材、自動車用内装部材および自動車用ドアトリム
DE10005665A1 (de) * 2000-02-09 2001-08-16 Emitec Emissionstechnologie Querbelastbarer Verbund aus Strukturteil und Deformationselement

Also Published As

Publication number Publication date
DE60116028D1 (de) 2006-01-26
US20020043747A1 (en) 2002-04-18
ITMI20002251A1 (it) 2002-04-18
DE60116028T2 (de) 2006-09-14
ES2256154T3 (es) 2006-07-16
BR0104557A (pt) 2002-05-21
EP1197673A3 (fr) 2002-08-21
EP1197673B8 (fr) 2006-03-15
EP1197673A2 (fr) 2002-04-17
BR0104557B1 (pt) 2009-05-05
IT1319049B1 (it) 2003-09-23

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